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Connection diagram

fig. 1 AC voltage endurance

fig. 2 DC load limit curve

Dimensions (mm)

Technical approvals, conformities

1.1 Interface Relays - pluggable

C10-A1x1 pole | changeover contact | Faston

6

A2A1

54

3

2

1

FASTON .187

28.8

12.5

4.75

35.4

20

6

A2A1

54

3

2

1

FASTON .187

28.8

12.5

4.75

35.4

20

VA 500 1000 1500 2000

switc

hing

cyc

les

x10

6

AC-1 Cos ϕ 0.4

10

0.1

Gap:0.5 mm

A2

A1

5

412 14

11

13

2

Maximum contact load 10 A/250 V AC-1 0.5 A/110 V DC-1 10 A/30 V DC-1 0.2 A/220 V DC-1 Recommended minimum contact load 10 mA/10 V Code 0, 5 5 mA/5 V Code 8

ContactsMaterial Standard Code 0 AgNi Optional Code 8 AgNi + 5 µ Au Optional Code 5 AgSnO2

Rated Load 10 AMax. inrush current (20 ms) 30 A (120 A for code 5)Switching voltage max. 250 V AC load fig. 1 2.5 kVADC load see fig. 2

CoilCoil resistance see table; tolerance ± 10 %Pick-up voltage ≤ 0.8 x UN

Release voltage ≥ 0.1 x UN

Nominal power 1.1 VA (AC)/0.7 W (DC)

Coil table V AC Ω mA V DC Ω mA 24 290 45 12 224 53 48 1200 23 24 742 32 115 7.300 9.5 48 3.500 13.7 230 28.800 4.7 110 19.900 5.5

Insulation Contact open 1000 VContact/coil 5 kV Insulation resistance at 500 V ≥1 GΩInsulation, IEC 61810-1 4 kV

SpecificationsAmbient temperature operation/storage -40 … 70 ºC /-40 … 80 °C (no ice)Pick-up time/bounce time 10 ms / ≤ 1 msRelease time/bounce time 5 ms / ≤ 3 ms Mechanical life ops AC: 10 Mill./DC: 20 Mill. DC voltage endurance at rated load ≥ 100 000 switching cyclesMax. switching frequency at rated load 1200/hWeight 21g

Product References V AC 50 Hz/60 Hz: 24, 48, 115 (120), 230 (240) C10-A10/AC ... V C10-A18/AC ... V C10-A15/AC … VLED C10-A10X/AC ... V C10-A18X/AC ... V C10-A15X/AC ... VRC Suppressor C10-A10R/AC ... V C10-A18R/AC ... V C10-A15R/AC ... V V DC 12, 24, 48, 110 C10-A10/DC ... V C10-A18/DC ... V C10-A15/DC ... VLED C10-A10X/DC ... V C10-A18X/DC ... V C10-A15X/DC ... VPolarity and free wheeling diode C10-A10FX/DC ... V C10-A18FX/DC ... V C10-A15FX/DC ... V

V AC/DC bridge rectifier 24 V, 48 V C10-A10BX/UC ... V C10-A18BX/UC ... V C10-A15BX/UC ... VOther voltages on request

"..." List Coil Voltage to complete Product References

Accessories Socket S10, S10-P

Volt 50 100 150 200

Am

ps.

DC-1 L/R 40 ms

10

1

0,1

1

IEC/EN 61810; IEC/EN 60947

8 | WoR 1

Product rangeComatReleco offers a wide range of relay types and versions and associated sockets and accessories.

Industrial Relays C2, C3, C4, C535 x 35 mm round plug-in relay, 8- or 11- terminals multipole connector according to IEC 67 with 2 or 3 contacts up to 10 A and different contact types and contact materials.Standard relay 35 x 35 mm with flat blade connectors with up to 4 contacts and up to 16 A with 4 contacts.

Industrial Relays C7, C922.5 mm series with up to 4 contacts and up to 10 A with 1 or 2 contacts.

Interface Relays, C10, C12, C16, C18Overall width 13 mm with up to 2 electro-mechanical contacts, or fully electronic switches.

Special relays, remanence relaysWhile "normal" relays are monostable, i.e. they return to the idle state when the excita-tion is switched off, remanence relays are bistable, i.e. the current switching state is retained irrespective of the excitation. Relays of this type are available in different versions.

Solid State Relay CSSCSS Relays are suitabe to either switch AC or DC loads up to 6 A. For AC relays a distinction is made between synchronously (zero crossing) and asynchronously switching versions. For switching transformer loads we recommended using asynchronously switching semiconductor switches. For incandescent lamp loads etc. synchronously switching switches are ideal for avoiding high switch-on currents.

AccessoriesSuitable sockets are available for the dif-ferent relay series for DIN rail mounting or panel mounting. In addition, retaining clips are available for the relays, some of which are included in the scope of supply. Suitable bridges for cost-saving wiring in series are also available.

() Special requirementsH = Orange button. No lockable functionN = Black button. No functionP = PCB pins

E = Lap transparent coverT = Close transparent cover (lamp)

PT = PCB pins, 3.5mm grid, transparent coverPTL = PCB pins, 5mm grid, transparent cover

Basic identification principle (type designation code electromechanical relays)

X = Electric position indicating device with LED

Describes the optionsD = Integrated free-wheeling diodeF = Integrated free-wheeling diode and series diode e.g. for common alarm circuits R = RC connection for the coilB = Bridge rectifierPT = Transparent PCB Relay with 3mm GridPTL = Transparent PCB Relay with 5mm Grid

Definition of contact material This code may differ depending on type.Examples:

0 in the standard range stands for AgNi 1–9 see contact material for each type

Number of contacts

Relay typeA = Standard (general-purpose) contactE = Sensitive drive with 500 mW coil powerG = Refers to a NO contact H = Single-point contact + twin contact load to signal current circuit for switching state feed back. Mixed contact configurationM = Relay with highly effective neodymium blow magnet for fast quenching of the arc. This relay is particularly suitable for high DC loads.N = Sensitive drive 800 mW coil powerR = Code for remanence relays, drive-specific IDS = Sensitive drive with 250 mW exciter input T = Twin contact for signal and control circuitW = With tungsten contact for maximum switch-on currentsX = Relay high power, double make contact.B = Single C.O. contact with two pins per connection

Basic type refers to the product line Numbers between 2 and 12 and 20, 30 are used.

Normal industrial relay codeRelays with code R are used for railway series.

Ref. nnnnRelays with a reference number are versions with special (e.g. customised) features. These features may relate to special test criteria, tolerances or other properties.

Availability of such relays may be limited to certain customers or applications.

Nominal coil voltage specificationAC … V AC 50/60 Hz,

voltage 6 – 250 (400) VAC … V 60 Hz AC 60 Hz, 120, 240 VDC … V DC, voltage 5 – 220 VUC … V AC/DC

C n(n) - T X y z () z /….V RF-nnnn

1 Relays & Contactors

Industrial RelaysGeneral Information

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Industrial Relays C2-C9Protection against transientsWhen the coil is disconnected from an electro-magnet, peaks of inverse voltage appear at the terminals which can reach very high values. These pulses can be transmitted down the line associated with the coil and could possibly affect other components.In the case of a realy being operated by such devices as transistors, Triacs, etc; it may be necessary to protect against transients.

Transients carried in the lineHigh voltage surges can be carried in the sup-ply line to the relay coil. These may appear in the form of peaks or bursts and are generated by the connection and disconnection of elec-tric motors, transformers, capacitors etc.Normally a relay is unaffected by these pulses, but if a diode is connected in association with the coil, it must be capable of withstanding an inverse voltage higher than those of the incom-ing peaks.

Protection circuitsA protection circuit must efficiently cope with pulses generated by the coil as well as incom-ing line surges (surges U1.2/50µs.)ComatReleco Relays are available with inte-grated protection circuits or with modules plugged into sockets S3-M, S3-M0 or S3-M1.

X LED indication with rectifier.For DC and AC relays up to 250 VNote: LED connected, in series with the coil @ 220 V DC in QRC types.

DX Free-wheeling diode + LEDDampens transients caused by the relay coil on de-energisation.

FX Polarity + free wheeling diode + LEDA diode in series with the coil protects the relay from reverse connection.

BX Bridge rectifier + LED indicationAllows the relay to operate in both AC or DC without any polarity inconvience. Available only in voltages up to 60 V.

R Resistor and capacitor.

Industrial Relays C10-C18LED and protection circuit connected to coil. X LED with no polarity, (standard)

Coils ≤ 12 V A DC coils LED rectifier bridge in parallel

X LED with no polarity, (standard) Coils ≥ 24 V A DC coils LED rectifier bridge in series

FX LED with polarity A1+ (option) Every DC coil voltage Polarity and Free-wheeling diodes

BX LED with no polarity, (option) Only 24 V and 48 V A DC coils Rectifier bridge for AC/DC relays

R LED not available (option) RC protection against pulses on AC

Protection against pulsesWhen a relay coil is disconnected, reverse voltage peaks may arise and reach very high values. Said peaks can transmit to the coil associated line and other relays or semicon-ductors can be affected.

If Triac, transistor, etc. controls a relay, appro-piate steps must be taken to avoid or decrease peaks down to a non risky level.

Both Polarity and Free-wheeling diodes (FX), must protect coils, to avoid malfunctions pro-vided DC relays in battery are installed.

Making or breaking engines, transformers or contactors in an industrial environmental, may generate high voltage pulses, either isolated or burst, through the main line.The voltage level of those pulse may be high enough to affect the isolation of the coil.

X

F FX BXB

DX

BXX≤12V

X≥24VR

FX

D

R

1 Relays & Contactors

Coil accessoriesGeneral Information

X

F FX BXB

DX

BXX≤12V

X≥24VR

FX

D

R

X

F FX BXB

DX

BXX≤12V

X≥24VR

FX

D

R

X

F FX BXB

DX

BXX≤12V

X≥24VR

FX

D

R

X

F FX BXB

DX

BXX≤12V

X≥24VR

FX

D

R

10 | WoR 1

ContactsThere are different contact types. The main distinction is between single contacts and twin contacts. While single contacts are more suit-able for higher loads, twin contacts are signifi-cantly more reliable at small loads, i.e. < 24V, < 100mA.

Contact MaterialThere is no all-purpose contact!AgNi is used as standard material for a wide range of applications. AgNi contacts with hard gold plating (up to 5µm) are offered for appli-cations in aggressive atmosphere. Relays with gold contacts are approved for relatively high currents (e.g. 6A, 250V), but in practice values of 200mA, 30V should not be exceeded for operation with intact gold plat-ing.Relays with a tungsten pre-contact are avail-able for very high switch-on currents (up to 500A, 2.5ms). For some applications AgNi contacts with gold flashing (0.2µm) are availa-ble. The purpose is corrosion protection during storage. Tin oxide is specially appropiated for load with high-inrush current.

Minimum loadThe minimum load value is a recommended value under normal conditions such as regu-lar switching, no special ambient conditions, etc. Under these conditions reliable switching behaviour can be expected.

Contact resistanceInitial values of resistance of contact can vary with the use, load and others conditions.Typical values when the relay is new is about 50mΩ.

Contact spacingNormally all contacts have an air gap between 0.5 … 1.5mm when they are open. They are referred to as µ contacts. According to the Low-Voltage Directive and the associated standards these contacts are not suitable for safe disconnection.For switching of DC loads large contact clear-ances are beneficial for quenching the arc. See relays with "Cx-Gyz" naming. "G" stands for extended contact gap of 3mm.

Switching capacityThe contact switching capacity is the product of switching voltage and switching current.For AC the permitted switching capacity is generally high enough to handle the max. continuous AC-1 current over the whole volt-age range. For DC the load limit curve must never be exceeded, because this would lead to a remaining switch-off arc and immediate destruction of the relay. The order of mag-nitude of the DC switching capacity is a few 100W (DC-1).

During intermittent operation significantly higher overvoltages temporary may occur for short periods. If in doubt please consult our specialists.

General designComatReleco Relays are made from high-quality, carefully selected materials.They comply with the latest environmental regulations such as RohS. Their meticulous design makes them particularly suitable for industrial applications and installation engi-neering.They are particularly service-friendly through robust terminals, mechanical position indi-cating device a standard, manual operation, dynamic, permanent characteristics.Colour coding for manual operation as a function of the coil voltage is another useful feature. Further options such as different coil connections, free-wheeling diode, LED display, bridge rectifier for AC/DC drives etc., and short-term availability of special versions for practically any drive voltage up to DC 220V /AC 400V leave nothing to be desired.Apart from a few special versions, in general, ComatReleco industrial relays feature manual operation (push/pull) and a mechanical posi-tion indicating device. For safety reasons, manual operation may be replaced with a black button, if required.

Coil connectionsDifferent coil connections can be integrated in the relay as an option. For DC a cost-effective free-wheeling diode is available. Please note that the stated release times are generally specified without the coil connection. While an additional LED status indicator haspractically no effect, a free-wheeling diode (D)will lead to an increase in release time by afactor 2 to 5, or 10ms to 30ms. For AC VDRsor RC elements may be used. In this caseresonance effects may have to be considered.VDRs and common RC elements may increaserelease times by less than 5 ms.

2

1

Ub/UN 1.7 1.5

1.3 1.1 0.9

0.7

0.5

All -20 -5 10 25 40 55 70 T ºC

Drive (coil)The drive of a relay refers to the coil plus con-nections. The coil has special characteristics, depending on the rated voltage and the type of current.

Coil designThe coil consists of a plastic former (resist-ant up to about 130°C) and doubly insulated high-purity copper wire, temperature class F. The winding must withstand threshold voltag-es (EN 61000-4-5) of more than 2000V. This is ensured through forced separation of the start and end of the winding.

Coil resistance and other propertiesEach coil has an ohmic coil resistance that can be verified with an ohmmeter. The specified coil resistance applies to a temperature of 20°C. The tolerance is ±10%.For AC operation the coil current will not match the ohmic value, because self-in-ductance plays a dominant role. At 230V this may reach more than 90H. When a relay is switched off, self-inductance results in a self-induced voltage that may affect the switching source (destruction of transistors, EMC problems).

Drive voltagesA distinction is made between the standard-ised voltages according to EN 60947 as guar-anteed values, and typical values that can be expected with a high degree of probability.

Pick-up voltage, Release voltageThe pick-up voltage is the voltage at which the relay engages safely. For DC the typical trip voltage is approx. 65% of Unom, for AC approx. 75%. The release voltage, on the other hand, is approx. 25% or 60% respectively.For DC these voltages are strongly tempera-ture-dependent, according to the temperature coefficient of Cu. This is not the case for AC, where the inductive resistance is the con-trolling factor, which is practically constant over a wide temperature range.With AC, in a certain undervoltage range the relay may hum, and the armature may flutter. This voltage range must be avoided.

Operating voltage rangeUnless specified otherwise, the following char-acteristic curve applies for the operating volt-age range. The upper limit of the coil voltage is determined by self-heating and the ambient temperature. Self-heating through contacts under high load must not be underestimated. It may be higher than the power dissipation in the drive.

1 Relays & Contactors

Industrial RelaysGeneral Information

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Main technical approvals and standardsStandards, conformitiesAll ComatReleco relays feature the CE mark to indicate that CE standards apply e.g. 2kV surge resistance according to EN 61000-4-5. A significant and not generally available characteristic is that the coils and in particu-lar the connections are able to withstand the voltage spikes that may occur in practice.In addition, the relays feature various tech-nical approvals depending on the respective relay code, and they comply with further standards and guidelines. The main techni-cal approvals include cURus, CCC, Lloyd‘s Register, cULus and EAC.The associated information is provided in the data sheets.

Switching classesEN 60947 defines different switching classes that specify the suitability of contacts for dif-ferent load types.

Example:AC-1 = Ohmic AC loadAC-3 = Motor loadsAC-15 = Power contactors, solenoid valves, solenoidsDC-1 = Ohmic DC loadDC-13 = DC contactors, solenoids

UL60947 contains different technical approval criteria such as general purpose, control application etc. Switching classes are defined based on the electrical switching capacity, e.g. B600 etc.

Choosing the right SocketFor plug-in industry, interface, time, and mon-itoring relays, we offer sockets with the corre-sponding pin configuration and various layouts for the terminal connectors. For easy identifi-cation, you'll find those symbol referring to the matching socket.

Utilisation categories according to EN 60947-4-1/-5-1

Pollution categoryCat. 1Dry, non-conductive contamination without further effect

Cat. 2Occasional conductive contamination, short duration due to moisture condensation

Cat. 3Dry, non-conductive and conductive con-tamination with moisture condensation

Cat. 4Contamination with persistent conductivity through conductive dust, rain

Protection class IP according to EN 60529 and other standards. Industrial relays and their sockets can be classified as follows:Socket IP20: Contact safetyRelay IP40/IP50: not watertight, but protect-ed against ingress of coarse contaminants.

Electrical Distributor DIN 45mmAll devices with a housing fitting in an elec-trical distributor with a front of 45mm are marked with the following symbol.

Further information and tipsThe main operational criteria for relays such as number of cycles, switching frequency, ambient conditions, reliability requirements, load type, switch-on current, load switch-off energy must be clarified in order to ensure reliable operation and long service life.

ExampleIf the number of cycles is expected to exceed several 100.000 operations per year (e.g. clock generators, fast running machines), an electronic solution is no doubt more appropriate, although we also offer solutions for this type of application. In AC applications crosstalk caused by long con-trol leads is often a problem and can result in constant humming of the relay or even inadvertent triggering due to interference.

Different harmless loads may lead to very high switch-on currents or switch-off energy values, resulting in an unacceptable reduc-tion in service life. Particularly tricky are DC inductive loads.

Characteristics of various loads:

Heating circuitsNo higher switch-on currents, no higher switch-off loads.

Incandescent lamps, halogen lamps Switch-on currents during a few ms in the range 10 … 18 x rated. Switch-off at rated load.

Low-energy lamps Very high, but very short switch-on currents due to built-in decoupling capacitors. Contacts have a tendency to fuse.

Transformers, AC contactorsSwitching on during zero-transition may lead to switch-on currents of 8 … 15 x rated.High inductive switch-off energy is possible. The load must be connected, not least due to EMC problems.

China

Country Technical approval

Authority: CQCSpecificationGB14048.5-2001

Russia Authority:KORPORATSIASTANDARTSpecificationTP TC 004/2011

World WideUSA / Canada

Authority: ULSpecificationC 22.2; UL 60947

United Kingdom

Authority: GBLloyd´s Register of Shipping

1 Relays & Contactors

Industrial RelaysGeneral Information

12 | WoR 1

If you don´t want to have the lockable function, you can use the orange button.

Orange button, no lockable function, push only

Black button, no function

Five colours for an easier identification of coil voltage

AC red: 230 V AC (North America 120 V AC)

AC dark red: others V AC

UC grey: V AC/DC

DC blue: 24 V DC

DC dark blue: others V DC

Comprehensive technical label

1 Relays & Contactors

Industrial RelaysFull Features System

Colour code = coil voltage

Time cube

Time module

Retaining clip

Manual actuator (lockable)

Coil and power bridge bus bars Type & options

X LEDDX Freewheeling diode, LEDBX Bridge rectifier, LEDFX Polarity protection, freewheeling diose, LED

Mechanical status display

Marking label

Optical status display (optional LED)

Coil voltage marking

Part number

Coil details

Maximum switching capacityaccording to EN 60947 (IEC 947)

Aditional cir-cuit diagram for coilElectric diagram showing all additions to the coil

Wiring dia-gram with sequential and DIN numbers

Approvals

Last edit:Printing color: white

Revision:

A4 1 / 1Sheet / Nb

Side print Name:

Drawing Number:

Scale

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State: Released

15001-942-37-003C3-X10 (India)

Filename: DvS_C3-X10_IND.ai Ia

01.03.2018 Mi

01.03.2018 Ld

20.05.2015

A1

A210

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Made in India

10A 250 Vac10A 30 Vdc

AC 2.8 VA DC 1.3 W10 A / 250 V AC-1 | 10 A / 30V DC-1

C3-X10

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Symbol Voltage Current Use Type Material

Signal relays 100 mV…5 V 10 uA…1 mALow-level signals, Standard signals (0…10 V/ 4…20mA)

Gold-plateddouble contact

AgNi + Au

Gold-plated Single Contact

AgNi + Au

Control relays 5 V…30 V 1 mA…100 mA

PLC inputs, Control circuits

double contact AgNi

Gold-plated Single Contact

AgNi + Au

Frequent, rapid switching procedures

SemiconductorMosfet (DC)Triac (AC)

Power relays 30 V …400 V 100 mA…16 A

Increased AC or DC loads Single Contact AgNi

Electromagnets(utilisation cat. AC-15/DC-13)

Single Contact AgSnO2

Frequent, rapid switching proce-dures, high reliability, noiseless switching

SemiconductorMosfet (DC)Triac (AC)

High-power relays

12 V …400 V 100 mA…16 A

Capacitive loadsEarly make contact

AgNi + WAgSnO2 + W

High DC loads, inductive loads Series contactsAgNiAgSnO2

Frequent, rapid switching proce-dures, high reliability, noiseless switching

SemiconductorMosfet (DC)Triac (AC)

• Level of switching current

and voltage of the application?

• DC or AC switching?

• Inductive or

capacitive load?

• Expected number of switching

cycles?

1 Relays & Contactors

Industrial RelaysSelect the correct Relay